Check the listing for details. Scope Ring 1Inch/30mm Tactical Scope Light Flashlight Mount 20mm Picatinny Rail. Condition: New. Listed at 9.99 USD. Product Description You can mount the adapter on 30mm tube or on 1inch(25.4mm) tube. 1inch(25.4mm) and 30mm adapter rings are included. Hex wrench is included for easy installation. 45mm long rail ensures you enough space for gun accessories installation. Feature: Excellent aluminum alloy Surface treated with hard black matte anodized Precision CNC processing to ensure the best quality Compatible with most scopes or barrels: with 1'' (25.4mm) or 1.18"(30mm) diameter Top Rail Length: 45mm, Top Rail Width: 20mm Easy to use without special tools Suitable for all kinds of environments, windproof and earthquake-resistant. Package includes: 1 x 30mm Ring Scope adapter base 1 x 1" Insert 1 x Hex wrench Please carefully compare the size of our products and the installation dimensions of your equipment before buying.